NOAA CIRES Twentieth Century Global Reanalysis Version 2

The Twentieth Century Reanalysis Project, supported by the Earth System Research Laboratory Physical Sciences Division from NOAA and the University of Colorado CIRES Climate Diagnostics Center, is an effort to produce a global reanalysis dataset spanning a portion of the nineteenth century and the entire twentieth century (1871 - near present), assimilating only surface observations of synoptic pressure, monthly sea surface temperature and sea ice distribution. Products include 6-hourly ensemble mean and spread analysis fields on a 2 by 2 degree global latitude-longitude grid, and 3 and 6-hourly ensemble mean and spread forecast (first guess) fields on a global Gaussian T62 grid. Fields are accessible in yearly time series (1 file per parameter) and monthly synoptic time (all parameters per synoptic hour) files. Ensemble grids, spectral coefficients, and other information will available by offline request in the future.

The Twentieth Century Reanalysis Project used resources of the National Energy Research Scientific Computing Center managed by Lawrence Berkeley National Laboratory and of the Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory, which are supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 and Contract No. DE-AC05-00OR22725, respectively.

Note: Version 2c of this reanalysis (running from 1851 - 2011) is the recommended research version. Please see ds131.2 to access Version 2c.

To Access Resource:

Questions? Email Resource Support Contact:

  • Doug Schuster
    UCAR/NCAR - Research Data Archive

Temporal Range

  • Begin:  1869-11-01T00:00:00Z
    End:  2012-12-31T21:00:00Z


Resource Type dataset
Temporal Range Begin 1869-11-01T00:00:00Z
Temporal Range End 2012-12-31T21:00:00Z
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : NOAA ESRL 20th Century Reanalysis Project Homepage

Related Resource #2 : Atmospheric Circulation Reconstructions over the Earth

Related Resource #3 : Oak Ridge Leadership Computing Facility

Related Resource #4 : NERSC science gateway. Selected 20th Century fields are available in NetCDF4 from every member of the analysis ensemble.

Related Resource #5 : Reanalysis Wiki for user/provider information exchange.

Related Resource #6 : NOAA ESRL 20th Century Reanalysis web page. Provides access to a NetCDF version of the data, and monthly means.

Related Resource #7 : NCAR Command Language GRIB to NetCDF file structure description.

Related Resource #8 : Individual Ensemble Member Grids from the 20th Century Reanalysis in GRIB format

Related Resource #9 : Summary of available global reanalysis dataset and collaboration space

Related Resource #10 : 20th Century Reanalysis status mailing list (Reanalysis-20cr-notify)

Additional Information N/A
Resource Format WMO_GRIB1 (Binary)
Standardized Resource Format GRIB
Asset Size 13619995 MB
Legal Constraints

Use of this dataset is subject to UCAR's Terms of Use, except that commercial use is generally not prohibited.

Access Constraints Registration on the RDA web site is a requirement for access to the data.
Software Implementation Language N/A

Resource Support Name Doug Schuster
Resource Support Email
Resource Support Organization UCAR/NCAR - Research Data Archive
Distributor NCAR Research Data Archive
Metadata Contact Name N/A
Metadata Contact Email
Metadata Contact Organization NCAR Research Data Archive

Author Compo, G. P.
Whitaker, J. S.
Sardeshmukh, P. D.
Matsui, N.
Allan, R. J.
Yin, X.
Gleason, B. E.
Vose, R. S.
Rutledge, G.
Bessemoulin, P.
Bronnimann, S.
Brunet, M.
Crouthamel, R. I.
Grant, A. N.
Groisman, P. Y.
Jones, P. D.
Kruk, M. C.
Kruger, A. C.
Marshall, G. J.
Maugeri, M.
Mok, H. Y.
Nordli, O.
Ross, T. F.
Trigo, R. M.
Wang, X. L.
Woodruff, S. D.
Worley, S. J.
Publisher Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory
Publication Date 2009-05-14
Digital Object Identifier (DOI)
Alternate Identifier ds131.1
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress onGoing
Metadata Date 2024-01-03T15:11:25-07:00
Metadata Record Identifier edu.ucar.rda::ds131.1
Metadata Language eng; USA
Suggested Citation Compo, G. P., Whitaker, J. S., Sardeshmukh, P. D., Matsui, N., Allan, R. J., Yin, X., Gleason, B. E., Vose, R. S., Rutledge, G., Bessemoulin, P., Bronnimann, S., Brunet, M., Crouthamel, R. I., Grant, A. N., Groisman, P. Y., Jones, P. D., Kruk, M. C., Kruger, A. C., Marshall, G. J., Maugeri, M., Mok, H. Y., Nordli, O., Ross, T. F., Trigo, R. M., Wang, X. L., Woodruff, S. D., Worley, S. J.. (2009). NOAA CIRES Twentieth Century Global Reanalysis Version 2. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. Accessed 21 May 2024.

Harvest Source